Hypodermic syringe



y 1950 I M. L. LOCKHART 2,514,883

HYPODERMIC SYRINGE Filed 1946 2 Sheets-Sheet 1 Fig.1. I

30 HI II I .mll l IN V EN TOR.

JYaTSZdZl Z. lot/Mari BY M W 74m,

A TTOR/ViYS y 1950 M. LOCKHART 2,514,883

HYPODERMIC SYRINGE Filed Oct. 24, 1946 2 Sheets-Sheet 2 IN VEN TOR.

Mars/tall Z. [ac/(hurl BY M W fl TTORNEYS Patented july l l 1950 UNITED PATENT OFFICE r h 2-,514,8B3

HYFODERMIC SYR'HNGE MdrshalILLoclthdtt, Rutherford} N J} Applicatioiioctoberz i, 194%; Serial No; 7653292? 2 Claims; (o1.12s--220) invention relates to a structurally and W functionally improved hypodermic syringe and its more specificaspects" aims; to provide a unit; of" this"- character which is" usedin conjunco tion. with an ampiu'ie acting as a. medicament osfi'th'e' parts occurrihg wi1Lbe-substantia3-1y pie eluded, [Another object is' that of providing a hypodermic syringe assembly with wh-ich a; med-icement-contaiiqing ampuie may. red 13* cooperate to permit of an expressin of 2,11 'pai'rt of the contents of the ampuiethrough: the cannula of the sym' nge- I I stihtxan'other object'is that of: providing: an apparatus embneicing both a; hold andi needle arid Whicitparts-wi1i be oeipaible of quantity maria feceturesand: Willi operate"overiong periods of time with freedomz from alidifiicu'lties.

Withthese aim-d1. other objects in mindi, rerer ence'i's hadtoe the attached sheets'ofidl' aiwi gs F lustrating practical emlo'odimeiits of: the inven tim and in wkiic'hiz i Fig; 1-: is: a: side elevation of a; hypodermic syringe showing an ampule: int associatiomthere Witty Z'z'isasimilar View showing. the ampu'ra i fully protected position; r

Fig; 3: is a; sectionel'iaside View of? the" syringe as=ii1ustmted in Fig; i c Fig; 4 is: a longitudinal section" takefiialon'g: the lines 4-7-4 and in the direction of thetarrbwS as indicated in Fig. 3;. such figure" moreover show ing, the needle separatediirom the holder proper y Fig; a; transverse'sectional. view? taker'i along the lines: 5- 5 and in: the direction offith'eli arrows alrrindicate'd-vin Fig'; 3*;

-Fi-"g; 6riS"a'ViW similar to Fig; 1 but showing an alternative form of: construction;

7 is a somewhat enlarged fragmentary sectional' viewl of the unitesrshbwncifi -Fig; 6*; t

Fig. 8 is.-a;- transverse sectional viewe'takerr along the lines 88- and inthe direction of thee arrows as indicated; in Fig; 7;; v r

91 is: a: longitudinal: fragmentary seotiom showing; the needle partiallydismountedi f'igi. i=0 illustrates ain-r alternative: forrm ot contstru'ction; showing the forward portion of the holder and a; part of the needle;

Fig. 11'. is atransvers' sectionat View taken along the lines I. t.--i l: and the direction of the arrows as indicated: in Fig. 10';

Fig. 12: is a viw'simiiai to Fig; 11 but showing the parts adiix'stedto a different position;

Fig 1531s at view simiieir to Fig. 7 but showing a still" differe'riit form" of construction;

Fi'gi. 14 it; a: transverse seet'io'nalview taken along:tI'Ie'Iiiies I I M in the dii-"ectio'n of the arrows as indicatect m 1:33

: one

* View or the parts shown arid:- the direction of'tiie arrowsas shown in Fig. 13.

Primarily i oferi' g' to'Figs- 1 to 5, it willbe seen that thereference n um ersi 2 0" iii-amiss the b'o'dy'ofthe holder w eti may be: formed ofs-u-italblie meter and presr it's a cylindrical am'pule neceiving chember or space 2t. A fingerwoii taetihg p rtion ii'i the" formof a wirig plate me be 'di'sposd' at-th'e rear end of the" body 20. portibrifi eitteiidls into'the chamber 2] mid merges with" the may adjdceiit its oiitf end the foriri of what be termed a: nose portiori Z41 i ap arent;-- fibifia; donsideraLtioh of these vi'ews' i tiie thrirst pertion is spaced? from the i'nner f'a'zc'e of- -ttie bodyflfl to aisuhstantial ex: tents Acc'ordirrgm,-a wall of am ampule'iiray be received in this space;

Asiilustrot'ed iri Figs; 'ain'd' i the ampule' niay comeriieimy t for-trot s cylindrical body 25 ge Stoppers 21 tfiereot" arelonsiti x'di ri ai iy grantee ets ihdicatet at 32. The width of this groove is substantially in excess of the diameter of the needle 28. Adjacent its outer end, the groove is interrupted by a threaded socket portion 33, the threads of which correspond to the threads of the element 3|.

Thus, it is obvious when the parts are to be connected, the needle is moved laterally as indicated in Fig. 4 in the direction of the holder and the rear portion of this needle is disposed within the groove 32. Thereupon, the needle is rotated and axially shifted by'turning, for example, the knurled portion 30. This will have the result that the threads of the element 3| will engage with the threads in the socket 33. Consequently, the needle will be shifted axially. With the structures of Figs. 1 to 5. The dispensing of medicament through the bore of the needle with athrust portion 4| projecting as at 42 besuch shifting the pointed rear or inner end 29 of the needle will be brought to extend to a position beyond the thrust portion 23. Simultaneously, the parts will be locked against movement.

Now, if an ampule is introduced into the holder as shown in Fig. 1, an initial projection of the same will cause the inner pointed end 29 of the needle to pierce the left-hand stopper 21 as shown in that figure. Under such circumstances,

the thrust portion 23 will engage the outer face of this stopper as also shown in this figure. Continued projection on the part of the ampule will result in the plug or stopper 2! engaged by the thrust portion moving inwardly of the ampule to, for example, the position shown in Fig. 2. Under such movement, it is obvious that the plug will function as a piston to express the medicament contained within the ampule through the bore of the needle. With the medicament discharged from one end or compartment of the ampule, the latter may be withdrawn from the holder and reversed so that the entire operation may be repeated.

In the form of construction shown in Figs. 6 to 9 inclusive, the numeral 32 indicates a holder substantially identical in construction with the holder heretofore described. However, in this holder the thrust portion 33 is formed with a recess or channel 34 of a. substantial diameter.

This channel is in communication with a laterally extending groove 01-, slot 35. A needle 36-double pointed as in Fig. 4carries an enlargement 31, the outer end of which may be rounded as indicated at 38, its rear end extending in a plane perpendicular to the needle axis as indicated at 39. The-overall length of the enlargement 31 should be just less than the overall length of the chamber 34.

Assuming that the needle is detached from the holder and it is desired to associate these parts one with the other, it will be understood that the needle is generally moved in a lateral direction towards the holder as shown in Fig. 9. To this end, the body 36 of the needle will pass through the groove or slot 35 until the rounded forward end 38 of the enlargement rests within the chamber 34. Thereupon, by swinging the rear or inner end of the needle towards the holder, it will be found that the rounded end portion 38 will enter the countersunk outer end of the recess or chamber 34. Under such circumstances, the squared or equivalent end portion 39 of the enlargement may be swung to theposition shown in Figs. 6 and 7. Thus, the rear face 39 will lie adjacent the corresponding end wall of the chamber 34. Therefore, the needle will, in effect, be locked against lateral displacement with respect to the holder. As will be appreciated, an ampule may be associated with thisholder in the same manner as heretofore described in'connection with will also follow the procedure heretofore outlined.

The hypodermic syringe illustrated in Figs. 10, 11, and 12 also functions in the same manner in so far as dispensing of medicament is concerned as the heretofore described structures. However, as will be noted in these views, the holder which has been indicated by the numeral 48' is formed yond the nose proper or outer end of the holder. The abutment and holder are formed with a longitudinally extending groove in their side faces, which groove is enlarged to provide a recess portion 44. A hollow needle 45 may mount a spherical enlargement or similar portion. This needle is shifted laterally toward the holder so as to occupy the afore-mentioned groove and the enlargement 46 is positioned within the recess 44. In line with the recess 44, the projecting portion 42 is formed with a groove 43. A locking element or ring-shaped member 41 rides within this groove. It will also be observed that the enlargement 46 is preferably of a larger diameter than the recess 44. Therefore, and as shown in Fig. 11, if the enlargement is disposed within that recess to full extent, a portion of its body will extend into the groove 43. Therefore, as the split locking ring 41 is rotated the latter will ride over the enlargement as again indicated in Fig. 11. Consequently, a yielding restraining force will be exerted upon the enlargement which will serve tomaintain the portion of the needle disposed within the groove formed in the holder and thrust portion 4| against displacement. Thus, the needle is maintained as a fixed unit with respect to the holder. At the same time, a ready detachment or separation of these parts may be effected.

The same-is true of the structure shown in Figs. 13 to 16 inclusive. In these views, the numeral 48 indicates the holder provided with a thrust portion 49.- This thrust portion is continued in the form of a projecting part 50 beyond the outer end of the holder proper. Such extended part may carry pins 5| or otherwise present equivalent projections which may be received within openings of a cap 53carried by the needle 52. These openings, as shown especially in Fig. 15, may be in the nature of bayonet slots 55. A liner or cushion ofjresilient material 54 is preferably disposedin the inner face of the cap portion 53.

Again in this form of construction, the thrust portion 49 and the holder parts adjacent thereto are formed with a laterally extending slot or groove 56. Therefore, a'needle to be associated with the holder may be moved inwardly and laterally of the same. After such movement and with the cap 53 in line with the extension 50, the slots55 may be brought into registration with the pins or projecting portions 51. Thereupon, the entire needle assembly is shifted axially. Consequently, the cap will embrace the outer end portion of the extension 50 and the outer face of that extension will be engaged by the resilient liner 54. The latter will compress slightly and therefore the projections 5| will ride within the slot and, in effect, lock the cap against accidental displacement. As is apparent, the technique of associating an ampule with a holder of the latter type and in dispensing the medicament will be the same as heretofore described.

It will be'observed that by means of the constructions herein illustrated and described, a

. hypodermic syringe assembly is provided in which a holder and thrust portion are each provided with a continuous passage which may,

if desired, intersect somewhat enlarged recesses.

This passage is in the form of a slot or groove within which the needle may be disposed by lateral movement with respect to the holder. Substantially simultaneously with such disposition an axial movement of the parts with respect to each other, as in Figs. 1 to 9 and 11 to 16 inclusive, results in such parts, in efiect, being secured against further and accidental movement. Therefore, a structure is provided in which the operator need have no fear that an accidental detachment of the parts will occur. At the same time, a deliberate manipulation of these parts will permit of ready separation of the same.

Thus, among others, the several objects of the invention as specifically afore noted are achieved. Obviously, numerous changes in construction and rearrangements of the parts might be resorted to portion being formed with a screw-threaded recess in its outer end whereby a similarly threaded portion mounted by a needle may be received within said recess to retain the needle against movements with respect to said portion, a thrust portion extending from said mounting portion towards said base, inwardly oi saidchamber, and

U in spaced relationship to the adjacent inner faces of said body, and said screw threaded recess and thrust portion being formed with communicating aligned slots whereby a needle may be moved.

laterally through the open side of said body to 6 occupy a position within said slots and may thereafter he axially shifted and rotated to cause its threaded-portion to enter and engage with the threads of said recess.

2. A hypodermic syringe including in combination a tubular body formed with an open side face, a single nose portion closing one end of said body, the opposite body end being open, a thrust portion extending within the bore of the body from said nose portion in the direction of the open body end and being spaced from the inner face of said body, said nose and thrust portions being formed with a slot in line with the open 'side face of said body and which slot extends substantially to the body axis, said nose portion terminating in an outwardly extending screwthreaded socket having its wall interrupted by said slot, a nut, a screw-threaded boss extending from said nut, a double ended needle extending through said nut and boss and said needle being REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,008,078 Schroeder Nov. 7, 1911 1,623,403 Friel Apr. 5, 1927 1,624,327 Friedman Apr. 12, 1927 1,848,711 Hall Mar. 8, 1932 2,153,594 Safiir Apr. 11, 1939 2,410,351 Lockhart Oct. 29, 1946 Lockhart Sept. 7, 1948 

